Proposition 9 Fri Vespers UKFSDAC 030125 -

Because we remain sinners by nature until the second advent - we can never be perfect in the absolute sense till then.
Steps to Christ, 65
So long as Satan reigns, we shall have self to subdue, besetting sins to overcome, so long as life shall last, there will be no stopping place, no point which we can reach and say, I have fully attained. Sanctification is the result of lifelong obedience.
None of the apostles and prophets ever claimed to be without sin. Men who have lived the nearest to God, man who would sacrifice life itself rather than knowingly commit a wrong act.... have confessed the sinfulness of their nature. They have put no confidence in the flesh, have claimed no righteousness of their own, but have trusted wholly in the righteousness of Christ.